Tilting and swivel chair



July 21, 1936. STOLL 2,048,148

TIL'IING AND SWIVEL CHAIR Filed July 5, 1935 33 .32 1 It A 11 3 INVE R MAX 57 ATTORNEY Patented July 21, 1936 UNITED STATES PATENT OFFICE ICIaim.

My invention relates to swivel seat chairs and in more detail to a swivel seat chair in which the seat is also tiltable and rotatable.

The chairs in use at present are of many different kinds but they all although rotatable can only tilt in one direction or are only tiltable and not rotatable or have no framework or foot rest.

An object of my invention is to construct a tilting swivel chair or seat in which the tilting can be in any direction and in which only the seat tilts.

Another object of my invention is to construct a chair in which the locking means to hold the seat in a raised or lowered position is continuously held in line so as to permit the seat to be easily locked.

A further object of my invention is to construct a strong, simple, durable and easily fashioned swivel and tilting chair or seat.

Another object of my invention is to construct a swivel, revolving, adjustable elevating chair with legs.

I accomplish these and othm' objects by providing inside the upper end of a tube a keywayed bushing and inside the bushing a keyed shaft and providing holes in the tube and bushing and openings in the shaft, all the holes and openings being aligned together, and constructing at the head of the shaft 9. ball and spring swivel joint and above the swivel joint a rotating means carrying a seat and placing at the lower end of the shaft a plate and spring and constructing at the outside of the tube near its upper end a locking spring means which can extend into the holes in the tube, bushing and shaft to lock the parts in place.

Further and more specific details and objects of my invention will be shown and described in the accompanying drawing and specification. Fig. 1 is an elevation partly in section showing my swivel chair with legs added. Fig. 2 is a section along the line 22 of Fig. 1. My chair in general may be divided into parts such as the raising means I, frame work 2, locking mechanism 3, swivel mechanism 4 and tilting mechanism 5.

The chair can be either anchored to the floor in which case it would be provided with a slightly enlarged base 6 at its lower part or it may be provided with legs I properly attached and with the cross piece 8 added for strength and as a foot rest.

The raising mechanism l is comprised of a spring 9 which rests on the base 6. The spring may be a coiled spring as shown or any other suitable type. The upper part of the springwests against a plate It which is attached by a screw II to the lower end of the shaft l2. The supporting frame 2 comprises a tube 2A which extends upward from the base 6 encasing the spring plate and part of the shaft. Inside the tube at its upper part is a bushing II which is provided with a key way It. The shaft I2 is provided with a key it corresponding to and fltting into the key way on the bushing. As the bushing is secured in the tube so that it cannot turn, the shaft cannot turn and so can only be raised or lowered, the key always riding in the key way.

At the upper end of the tube 2A the locking mechanism 3 is constructed on a flange It at its under side. The legs I are also attached at their upper ends to the under side of this flange. The locking mechanism 8 comprises a spring I! abutting the under side of the flange and the angled part It pivoted at I! to the flange. The part it is provided with one arm 20 resting against the spring II and another arm 2| extending downward from the pivot. The arm 2| terminates in a handle 22 and a projecting part 23. The tube and bushing are provided with an opening 22A so that the projecting part 23 can extend therethrough. The shaft is notched at various places 24 aligned with the opening in the tube and bushing so that the projecting part 22 can catch in the notches 24 of the shaft. The spring ll pushes the arm 20 downward and causes the proiecting part 22 to hold flrmly Mainst the notches 24. As the shaft cannot rotate the notches will always be aligned with the projecting part 23 making the locking of the shaft easy.

The tilting mechanism is constructed at the head of the shaft by placing the ball 25 in the bearing 2 in the shaft end face. The upper part of the ball is provided with the extension 21. The ball 25 is held in the bearing 26 by the threaded cap 28 which flts around the ball and threads onto the end of the shaft. Just below the cap, the shaft is provided with the flange 29 against which the spring it rests. The spring 20 is coiled about the ball and cap and extends between the flange 29 and the under part of the bearing Ii, and permits the seat 32 to be tilted but provides compression to hold it properly. The ball and its extension with the nut 33 at its end holds the spring in and keeps the seat properly positioned on the end of the shaft.

The swivel mechanism 4 comprises the bearing 2i which is constructed with the two plates 24A and 34 separated by the balls 25 which travel .in the groove in the adjacent faces of the gether as the spring presses against the under p cific description and so I desire to ooge all 2g sesame I claim: An adjustable, swivel, tilting chair having a tube, a keywayed bushing in the tube, a shaft keyed at its lower end and extending into. the keywayed bushing and at its upper end threaded 5 and flanged, spring means inside the tube below the shaft, locking means attached to the tube and acting to lock the shaft, a concave ball socket in the flanged end of the shaft, 2. ball resting in e a s e ie ie inee se d 1 ,t ms e eadiis; p shallow cap having an opening through which the extensign projects fitting over the ball and threaded 7 plates. The not 33 rests against the upper surface oi the plate 34 -and holds the two plates tosuriace-oi the lower plate while the extension 21 extends through the plates to carry the nut 88. In this way the seat is provided with both a swivel and a tilting mechanism. The under part of the seat is provided with the cut out part 3? for the not the egdiof the a upper se ms em so seat in any appropriate manner.

As the details described and the drawing shows very s 'iflcally certain improvements for the end of the shaft, a swiveling means prov ilting swivel chair and sinceWhy mun-- ease-mow- "e end of the extension from the 15 flea ons and changes may be made spging encasing the bail and extension and invention without changing or departing from I between the flange oi the shaft and the spirit and scope of the ideas c6nveied" in the*- the ih'i'der s'ideoflthe swiveling means and a seat swiyeling means.

modifications, forms and embodiments"'oi ideas coming within thee-language theappendedrelaim; 

